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<h1>src/qvblockprogramming/qvguiblocks/qvdesigner/slate/link.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00021"></a>00021 
<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;QtGui&gt;</span>
<a name="l00023"></a>00023 
<a name="l00024"></a>00024 <span class="preprocessor">#include &quot;link.h&quot;</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include &quot;node.h&quot;</span>
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 Link::Link(Node *fromNode, QString fromProp, Node *toNode, QString toProp, QGraphicsItem * parent, QGraphicsScene * scene): QGraphicsLineItem(parent, scene), line2(this, scene), line3(this, scene), line4(this, scene), line5(this, scene)
<a name="l00028"></a>00028 {
<a name="l00029"></a>00029     myFromNode = fromNode;
<a name="l00030"></a>00030     myToNode = toNode;
<a name="l00031"></a>00031         myFromProp = fromProp;
<a name="l00032"></a>00032         myToProp = toProp;
<a name="l00033"></a>00033 
<a name="l00034"></a>00034     myFromNode-&gt;addOutLink(<span class="keyword">this</span>);
<a name="l00035"></a>00035     myToNode-&gt;addInLink(<span class="keyword">this</span>);
<a name="l00036"></a>00036 
<a name="l00037"></a>00037     setFlags(QGraphicsItem::ItemIsSelectable);
<a name="l00038"></a>00038         line2.setFlags(QGraphicsItem::ItemIsSelectable);
<a name="l00039"></a>00039         line3.setFlags(QGraphicsItem::ItemIsSelectable);
<a name="l00040"></a>00040         line4.setFlags(QGraphicsItem::ItemIsSelectable);
<a name="l00041"></a>00041         line5.setFlags(QGraphicsItem::ItemIsSelectable);
<a name="l00042"></a>00042 
<a name="l00043"></a>00043         setHandlesChildEvents(<span class="keyword">true</span>);
<a name="l00044"></a>00044 
<a name="l00045"></a>00045     trackNodes();
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 Link::~Link()
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050     myFromNode-&gt;removeLink(<span class="keyword">this</span>);
<a name="l00051"></a>00051     myToNode-&gt;removeLink(<span class="keyword">this</span>);
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="keywordtype">void</span> Link::changeFromPoint(Node *newNode, QString NewProp)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056         myFromNode-&gt;removeLink(<span class="keyword">this</span>);
<a name="l00057"></a>00057         myFromNode = newNode;
<a name="l00058"></a>00058         myFromProp = NewProp;
<a name="l00059"></a>00059     myFromNode-&gt;addOutLink(<span class="keyword">this</span>);
<a name="l00060"></a>00060 
<a name="l00061"></a>00061     trackNodes();
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 
<a name="l00064"></a>00064 <span class="keywordtype">void</span> Link::changeToPoint(Node *newNode, QString NewProp)
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066         myToNode-&gt;removeLink(<span class="keyword">this</span>);
<a name="l00067"></a>00067         myToNode = newNode;
<a name="l00068"></a>00068         myToProp = NewProp;
<a name="l00069"></a>00069     myToNode-&gt;addInLink(<span class="keyword">this</span>);
<a name="l00070"></a>00070 
<a name="l00071"></a>00071     trackNodes();
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 
<a name="l00074"></a>00074 Node *Link::fromNode()<span class="keyword"> const</span>
<a name="l00075"></a>00075 <span class="keyword"></span>{
<a name="l00076"></a>00076     <span class="keywordflow">return</span> myFromNode;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 
<a name="l00079"></a>00079 Node *Link::toNode()<span class="keyword"> const</span>
<a name="l00080"></a>00080 <span class="keyword"></span>{
<a name="l00081"></a>00081     <span class="keywordflow">return</span> myToNode;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 
<a name="l00084"></a>00084 QString Link::fromProp()<span class="keyword"> const</span>
<a name="l00085"></a>00085 <span class="keyword"></span>{
<a name="l00086"></a>00086         <span class="keywordflow">return</span> myFromProp;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088 
<a name="l00089"></a>00089 QString Link::toProp()<span class="keyword"> const</span>
<a name="l00090"></a>00090 <span class="keyword"></span>{
<a name="l00091"></a>00091         <span class="keywordflow">return</span> myToProp;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 
<a name="l00094"></a>00094 <span class="keywordtype">void</span> Link::setColor(<span class="keyword">const</span> QColor &amp;color)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096     setPen(QPen(color, 2.0));
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 
<a name="l00099"></a>00099 QColor Link::color()<span class="keyword"> const</span>
<a name="l00100"></a>00100 <span class="keyword"></span>{
<a name="l00101"></a>00101     <span class="keywordflow">return</span> pen().color();
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103 
<a name="l00104"></a>00104 
<a name="l00105"></a>00105 <span class="keywordtype">void</span> Link::trackNodes()
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107         <span class="comment">// actualiza el zValue al máximo de los dos, o al del mayor grupo al que pertenecen</span>
<a name="l00108"></a>00108         <span class="comment">// reducimos el tamaño del Pen del link en función del número de antecesores (*0.5 por cada uno)</span>
<a name="l00109"></a>00109         <span class="comment">//(solo se mira para uno pq no se permiten enlaces entre grupos)</span>
<a name="l00110"></a>00110         <span class="keywordtype">double</span> zvalue = (myFromNode-&gt;zValue() &gt; myToNode-&gt;zValue()) ? myFromNode-&gt;zValue() + 1 : myToNode-&gt;zValue() + 1;
<a name="l00111"></a>00111 
<a name="l00112"></a>00112         <span class="comment">// obtenemos el pen</span>
<a name="l00113"></a>00113         QGraphicsItem *ancestor = myFromNode-&gt;parentItem();
<a name="l00114"></a>00114         QPen myPen = pen();
<a name="l00115"></a>00115     <span class="keywordflow">while</span> (ancestor) {
<a name="l00116"></a>00116                 setZValue(ancestor-&gt;zValue() + 1);
<a name="l00117"></a>00117                 myPen.setWidthF(myPen.width() * 0.4);
<a name="l00118"></a>00118                 ancestor = ancestor-&gt;parentItem();
<a name="l00119"></a>00119         }
<a name="l00120"></a>00120 
<a name="l00121"></a>00121         <span class="comment">// obtenemos las posiciones origen y destino</span>
<a name="l00122"></a>00122         QPointF orig = myFromNode-&gt;scenePointPos(myFromProp, FALSE);
<a name="l00123"></a>00123         QPointF dest = myToNode-&gt;scenePointPos(myToProp, TRUE);
<a name="l00124"></a>00124 
<a name="l00125"></a>00125         <span class="keywordflow">if</span> (orig.x() &lt;= dest.x()) {
<a name="l00126"></a>00126                 setZValue(zvalue);
<a name="l00127"></a>00127                 setPen(myPen);
<a name="l00128"></a>00128                 setLine(QLineF(orig, dest));
<a name="l00129"></a>00129                 line2.hide();
<a name="l00130"></a>00130                 line3.hide();
<a name="l00131"></a>00131                 line4.hide();
<a name="l00132"></a>00132                 line5.hide();
<a name="l00133"></a>00133         }
<a name="l00134"></a>00134         <span class="keywordflow">else</span> {
<a name="l00135"></a>00135                 <span class="comment">// obtenemos el desplazamiento lateral para esta propiedad dentro de sus nodos (para que no se solapen verticalmente)</span>
<a name="l00136"></a>00136                 <span class="keywordtype">double</span> origDesp = 10.0 * (fromNode()-&gt;numProps() - fromNode()-&gt;propPoint(fromProp(), <span class="keyword">true</span>) + 1);
<a name="l00137"></a>00137                 <span class="keywordtype">double</span> destDesp = 10.0 * (toNode()-&gt;numProps() - toNode()-&gt;propPoint(toProp(), <span class="keyword">true</span>) + 1);
<a name="l00138"></a>00138 
<a name="l00139"></a>00139                 <span class="comment">// obtenemos la coordenada Y de las partes inferior</span>
<a name="l00140"></a>00140                 <span class="keywordtype">double</span> origBottom = <span class="comment">/*fromNode()-&gt;scenePos().y() +*/</span> fromNode()-&gt;sceneBoundingRect().bottom() + origDesp;
<a name="l00141"></a>00141                 <span class="keywordtype">double</span> destBottom = <span class="comment">/*toNode()-&gt;scenePos().y() +*/</span> toNode()-&gt;sceneBoundingRect().bottom() + destDesp;
<a name="l00142"></a>00142                 <span class="keywordtype">double</span> bottom = origBottom &gt; destBottom ? origBottom : destBottom;
<a name="l00143"></a>00143 
<a name="l00144"></a>00144                 setZValue(zvalue);
<a name="l00145"></a>00145                 line2.setZValue(zvalue);
<a name="l00146"></a>00146                 line3.setZValue(zvalue);
<a name="l00147"></a>00147                 line4.setZValue(zvalue);
<a name="l00148"></a>00148                 line5.setZValue(zvalue);
<a name="l00149"></a>00149                 setPen(myPen);
<a name="l00150"></a>00150                 line2.setPen(myPen);
<a name="l00151"></a>00151                 line3.setPen(myPen);
<a name="l00152"></a>00152                 line4.setPen(myPen);
<a name="l00153"></a>00153                 line5.setPen(myPen);
<a name="l00154"></a>00154                 setLine(QLineF(orig, orig + QPointF(origDesp, 0.0)));
<a name="l00155"></a>00155                 line2.setLine(QLineF(orig + QPointF(origDesp, 0.0), QPointF(orig.x() + origDesp, bottom)));
<a name="l00156"></a>00156                 line3.setLine(QLineF(QPointF(orig.x() + origDesp, bottom), QPointF(dest.x() - destDesp, bottom)));
<a name="l00157"></a>00157                 line4.setLine(QLineF(QPointF(dest.x() - destDesp, bottom), dest + QPointF(0.0 - destDesp, 0.0)));
<a name="l00158"></a>00158                 line5.setLine(QLineF(dest + QPointF(0.0 - destDesp, 0.0), dest));
<a name="l00159"></a>00159 
<a name="l00160"></a>00160                 <span class="keywordflow">if</span> ((myFromNode-&gt;isVisible()) &amp;&amp; (myToNode-&gt;isVisible())) {
<a name="l00161"></a>00161                         line2.show();
<a name="l00162"></a>00162                         line3.show();
<a name="l00163"></a>00163                         line4.show();
<a name="l00164"></a>00164                         line5.show();
<a name="l00165"></a>00165                 }
<a name="l00166"></a>00166         }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 
<a name="l00169"></a>00169 <span class="keywordtype">bool</span> Link::sceneEvent(QEvent *)
<a name="l00170"></a>00170 {
<a name="l00171"></a>00171         setSelected(<span class="keyword">true</span>);
<a name="l00172"></a>00172         line2.setSelected(<span class="keyword">true</span>);
<a name="l00173"></a>00173         line3.setSelected(<span class="keyword">true</span>);
<a name="l00174"></a>00174         line4.setSelected(<span class="keyword">true</span>);
<a name="l00175"></a>00175         line5.setSelected(<span class="keyword">true</span>);
<a name="l00176"></a>00176 
<a name="l00177"></a>00177         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179 
<a name="l00180"></a>00180 
</pre></div></div>
</td></tr></table>

<br /><hr><br />
<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
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